Configure Bfd For Ospf - Dell S4048–ON Configuration Manual

Example of the show bfd neighbors Command to Verify Static Routes
To verify that sessions have been created for static routes, use the show bfd neighbors command.
R1(conf)#ip route 2.2.3.0/24 2.2.2.2
R1(conf)#ip route bfd
R1(conf)#do show bfd neighbors
* - Active session role
Ad Dn - Admin Down
C - CLI
I - ISIS
O - OSPF
R - Static Route (RTM)
LocalAddr RemoteAddr Interface State Rx-int Tx-int Mult Clients
2.2.2.1 2.2.2.2
To view detailed session information, use the show bfd neighbors detail command, as shown in the examples in
BFD for BGP Information.
Changing Static Route Session Parameters
BFD sessions are configured with default intervals and a default role.
The parameters you can configure are: Desired TX Interval, Required Min RX Interval, Detection Multiplier, and system role. These
parameters are configured for all static routes. If you change a parameter, the change affects all sessions for static routes.
To change parameters for static route sessions, use the following command .
• Change parameters for all static route sessions.
CONFIGURATION mode
ip route bfd interval milliseconds min_rx milliseconds multiplier value role [active |
passive]
To view session parameters, use the show bfd neighbors detail command, as shown in the examples in
BGP Information
Disabling BFD for Static Routes
If you disable BFD, all static route BFD sessions are torn down.
A final Admin Down packet is sent to all neighbors on the remote systems, and those neighbors change to the Down state.
To disable BFD for static routes, use the following command.
• Disable BFD for static routes.
CONFIGURATION mode
no ip route bfd

Configure BFD for OSPF

When using BFD with OSPF, the OSPF protocol registers with the BFD manager. BFD sessions are established with all neighboring
interfaces participating in OSPF. If a neighboring interface fails, the BFD agent notifies the BFD manager, which in turn notifies the
OSPF protocol that a link state change has occurred.
Configuring BFD for OSPF is a two-step process:
1. Enable BFD globally.
2. Establish sessions with OSPF neighbors.
Related Configuration Tasks
• Changing OSPF Session Parameters
• Disabling BFD for OSPF
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Bidirectional Forwarding Detection (BFD)
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